33
     0       1      0     -1      0      1 
     1       2      0      0      1      0 
     2       1      2      0     -1      1 
     3       0      3      2      1      0 
     4       4      0      2     -1      1 
     5       2      3      1      3      0 
     6       4      3      4      2      0 
     7       2      5      3      5      0 
     8       3      5      6      3      0 
     9       2      7      5     -1      1 
    10       6      3      7      4      0 
    11       4      6      8      4      0 
    12       8      3      6      7      0 
    13       7      5      5      9      0 
    14       9      4      8     11      0 
    15       8      5     10      6      0 
    16       8      6      7     12      0 
    17      10      5      9     10      0 
    18      11      4     11     -1      1 
    19       9      6     13      8      0 
    20       7     10      9     14      0 
    21      12      6     12     13      0 
    22      10      8     10     15      0 
    23       7     13     14     -1      1 
    24       9     11     11     -1      1 
    25      12      8     16     12      0 
    26      12      9     13     -1      1 
    27      14      8     15     16      0 
    28      13     10     14     -1      1 
    29      10     14     15     -1      1 
    30      14     12     16     17      0 
    31      15     12     17     -1      1 
    32      14     15     17     -1      1 
--------------------------------
   s:    c    d   ea   eb
